A. Contaban is the correct answer
De donde es el profesor de español?
1. A la vendedora
The answer is number 1! It makes more sence in the sentence the others dont make sence with the sentence. Therefore, the answer is 1. a la vendedora
1. -an infinitive verb
2. -acaba
3a. -Voy a comprar comida
3b. -Mi mamá va al zoológico
4. -al
